VDB-348287 · CVE-2026-28558 · EUVD-2026-9107

gVectors wpForo Forum up to 2.4.15 SVG File Parser cross site scripting

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.1	$0-$5k	0.00

Summaryinfo

A vulnerability identified as problematic has been detected in gVectors wpForo Forum up to 2.4.15. Impacted is an unknown function of the component SVG File Parser. The manipulation leads to cross site scripting. This vulnerability is uniquely identified as CVE-2026-28558. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in gVectors wpForo Forum up to 2.4.15 and classified as problematic. This issue affects some unknown functionality of the component SVG File Parser. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

wpForo Forum 2.4.14 contains a stored cross-site scripting vulnerability that allows authenticated subscribers to upload SVG files as profile avatars through the avatar upload functionality. Attackers upload a crafted SVG containing CSS injection or JavaScript event handlers that execute in the browsers of any user who views the attacker's profile page.

The weakness was disclosed by Scott Moore. It is possible to read the advisory at wordpress.org. The identification of this vulnerability is CVE-2026-28558 since 02/28/2026. The exploitation is known to be easy. The attack may be initiated remotely. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 2.4.16 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-9107). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Forum Software

Vendor

gVectors

Name

wpForo Forum

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 5.1

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.4
NVD Vector: 🔒

CNA Base Score: 6.4
CNA Vector (VulnCheck): 🔒

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: wpForo Forum 2.4.16

Timelineinfo

02/28/2026 CVE reserved
03/01/2026 +1 days Advisory disclosed
03/01/2026 +0 days VulDB entry created
03/04/2026 +3 days VulDB entry last update

Sourcesinfo

Advisory: wordpress.org
Researcher: Scott Moore
Status: Confirmed

CVE: CVE-2026-28558 (🔒)
GCVE (CVE): GCVE-0-2026-28558
GCVE (VulDB): GCVE-100-348287
EUVD: 🔒

Entryinfo

Created: 03/01/2026 07:19
Updated: 03/04/2026 05:09
Changes: 03/01/2026 07:19 (78), 03/01/2026 21:40 (1), 03/02/2026 15:56 (1), 03/04/2026 05:09 (11)
Complete: 🔍
Cache ID: 216::103